A blood clot or thrombus is the final step of the coagulation cascade. It is a good thing when your body is trying to stop blood loss, however a blood clot can form in the veins after prolonged periods of immobility. This type of like that would require treatment.
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7

Need testing:
The only way to know if you have a blood clot is to get testing by a doctor. The two most common test is a venous ultrasound of the legs or a blood test called a D-dimer test. You would need one of these to assess. Although some patients with blood clots have leg symptosm of pain & swelling, many have no immediate symptoms at all & so can be dangerous (can embolize to lungs or delayed symptoms).
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DVT:
Your leg usually calf will be red and tender. Leg will be swollen with pain when you walk.. Diagnosis can be confirmed by
Doppler ultrasound . See your doctor because if you have, you need to be anticoagulated.
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Swelling and pain:
Symptoms are swelling and pain of the calf, foot, ankles, or any combination. These clots form in the veins and can be diagnosed by a simple ultrasound (noninvasive) testing. If you have a clot (termed deep venous thrombosis) , your doctor will place youon an anticoagulant to prevent pulmonary embolisms.
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